Shrikhande, Mohan S. and Sane, Sharad S. <br/><br/>
Quasi-symmetric designs   

 - Cambridge  Cambridge University Press  1991 
 - xv, 225p. Index 
 - London Mathematical Society lecture note series   v. 164 .
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<br/><br/><label>Dewey Class. No.: </label>519.501841  / Sh561.QS